New Haven, CT 06514 Frost Dates
When can you plant in New Haven, CT?
The last spring frost here typically falls around 04/17, about 232 days from today. The first fall frost typically arrives around 10/27, about 193 frost-free days later.
The USDA Plant Hardiness Zone Map puts New Haven in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 9 weeks of growing season left in New Haven before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/17 is the middle of 30 years of NOAA records, not a promise. Plant by 04/02 and you're betting against frost in roughly 9 years out of 10. 05/01 is the safer bet, historically only a 1-in-10 chance of frost that late.
How New Haven compares
At roughly 193 frost-free days, New Haven places 19,697 of 40,283 ZIP codes in this dataset. Within CT, it ranks 73 of 391.
Learn more
local microclimates covers what one yard in New Haven can differ from the 06514 normal. zone vs. frost date covers why Zone 6b and New Haven's frost date answer different questions.